54 LAMELLIBRANCHIATA. 



Protocardium nitidulum, Edwards (MS.). 



Horizon and Localities. 



Lower Eocene. — London Clay. Highgate ; Basingstoke ; Clarendon ; Heme 

 Bav. 



Protocardium parile, Dcshayes, 1860. 



Protocardium parik. 

 Desc. Aniiii. sans Vert. li^OO, vol. 1. pi. liv. fig.s. 1-3, p. o73. 



Hurizojis and Localities. 

 Upper Eocene. — Barton Beds. Barton. 

 Middle Eocene. — Bracklesliam Beds. Brook; Brainshaw; lluntingbridge. 



Protocardium plagium, Edwards (MS.). 



Horizon and Locality. 



Lower Eocene. — Thaiiet Sands. Heme Bay. 



Protocardium Plumsteadianum, J. Sowerby, 1813, 



Cardium IHumstcudimium. 

 Mineral Conchology, 1813, pi. 14 (middle figures). (Sowerby Coll.) 



Horizons and Localities. 



Lower I'locene. — Headiny Beds. Reading. — Oldharen Beds. Cliinhani, 

 near Basingstoke. 



Protocardium Selseiense, Edwards (MS.). 



Horizon and Locality. 



Middle l^ocene. — Bracklesham Beds. Brackleshara Bay. 



Protocardium semigranulatum, J. Sowerby, 1816. 



Cardimn semiyranidatum. 

 Mineral Conchology, 1810, pi. 144. 



Horizon and Localities. 



Lower Eocene. — London Clay. Primrose Hill ; Wandsworth ; Haverstock 

 Hill ; Potter's Bar ; Basingstoke. 



Protocardium semigranulatum, var., J. de C. Sowerby, 1850. 

 Cardium semiyranuhitttm, var. 



IJixon's ' Sussex,' 1850, pi. ii. fig. 20, pp. 91, 1G8. (Dixon Coll.) 

 Horizon aml^ocalities. 



Middle Eocene. — Bracklesham Beds. Stubbingtonj Bracklesham Bay. 



Protocardium subdiscors (?), d'Orbiguy, 1850. 



Cardium subdiscors. 



Prod. Pal. Strat. 18.50, vol. 2. p. 324. 

 Horizon and Locality. 



Lower Eocene. — Londim Clay. Clarendon. 



